Can’t say for sure, only ever used black cherry here.... Heartwood of wild cherry might be ok tho....? Hope someone has a definitive answer.
I've used wild cherry in my smoker with good results. You gotta do something with the cookies amiright!
It can smolder if there isn't enough pieces in the fire and split small enough. Just don't let the fire run out with cherry burning. With a strong fire there is no excess smoke.